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  • Title: Does tetanus immune globulin interfere with the immune response to simultaneous administration of tetanus-diphtheria vaccine? A comparative clinical trial in adults.
    Author: Dal-Ré R, Gil A, González A, Lasheras L.
    Journal: J Clin Pharmacol; 1995 Apr; 35(4):420-5. PubMed ID: 7650233.
    Abstract:
    In the management of wounds, sometimes it is recommended to give an adult-type tetanus-diphtheria (Td) vaccine dose plus tetanus immune globulin (TIG). Sixty and 59 healthy young adults previously immunized against tetanus (T) and diphtheria (D) were randomized to receive intramuscularly either Td vaccine alone (group 1) or Td vaccine plus 500 IU of TIG (group 2) simultaneously. Antitoxin response was assessed after 4 weeks and 4 months. Circulating antibodies were measured by enzyme-linked immunosorbent assay (ELISA). The cutoff of these tests was 0.1 IU/mL. Titers of 0.1 IU/mL or greater were considered protective. For geometric mean titers (GMT), antibody titers below the cutoff of the assay were given, arbitrarily, 0.05 IU/mL. At 4 weeks, 98% or more of the subjects in group 1 had circulating T and D antitoxin levels of 0.1 IU/mL or higher; in group 2, 95% and 90% of the subjects had titers above this limit for T and D, respectively. At 4 months, these percentages were 98% and 95% for T antitoxin levels in groups 1 and 2, respectively; whereas 96% and 88% of the subjects in groups 1 and 2 had D antitoxin levels of 0.1 IU/mL or higher, respectively. Significantly (P < .05) higher GMTs were seen at the 4-week assessment (but not at 4 months) in group 1, as compared with group 2, in both T and D antitoxin levels (9.91 IU/mL versus 5.60 IU/mL for T antitoxin, and 2.86 IU/mL versus 1.45 IU/mL for D antitoxin). This finding resulted from those participants with low (< 0.1 IU/mL) prevaccination antibody titers.(ABSTRACT TRUNCATED AT 250 WORDS)
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